代码重构

git-svn-id: http://code.alibabatech.com/svn/druid/trunk@319 b9813039-fb51-4c41-a8b9-e21c2acb5095

src/main/java/com/alibaba/druid/pool/vendor/MySqlValidConnectionChecker.java

@@ -46,7 +46,7 @@ public class MySqlValidConnectionChecker implements ValidConnectionChecker, Seri
         // if there is a ping method then use it, otherwise just use a 'SELECT 1' statement
         if (conn != null && driverHasPingMethod) {
             try {
-                ping.invoke(c);
+                ping.invoke(conn);
                 return true;
             } catch (Exception e) {
                 LOG.warn("Unexpected error in ping", e);